Method and apparatus for drawing glass.



W. L. MONRO.

METHOD AND APFARATUS FOR DRAWING GLASS. APPLIOA'NON FILED DEC. 28. 1907.

' Patented Jan. 19, 1915.

Z SHEBTSSHEET l Wz'zes-s: I

W. L. MONRO. METHOD AND APPARATUS FOR DRAWING GLASS.

APPLICATION FILED DEC. 28, 1907.

1,125,588. Patented Ja11.19,19l 5.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

WILLIAM L. MONRO, or PITTSBURGH, PENNSYLVANIA, AssIGNon To wINnow-GmssMACHINE COMPANY, or PITTSBURGH, PENNSYLVANIA, A conronnTIoN 01 NEW:rnnsnr.

METHOP'AND AIPAB IATUS FOB DRAWING GLASS.

Patented Jan. 19, 1915.

Application filed December 28 1907. Serial No. 408,398.

-Method-and Ap aratus for Drawing Glass,

of which the fo owing 1s a specification. My invention relates'to theart of drawing and blowing glass, particularly as'practised by machinemethods, and its primary object'is to avoid the usual double transfer ofglass, as by pouring or ladling into a drawing pot before drawing.

Other objects are, to provide forconveniently clearing the drawingvessel; to efficiently handle the drawing pot; to use the drawing potitself as a ladle; and to generally improve the method of drawing glassdirect from a furnace orforehearth.

I have illustrated the process in the ac-' companying drawings WhereinFigure 1 is a vertical section through a simple form of furnace and potwith the pot in dipping position, and Fig. 2 1s a plan'- v1ew of thesame with the pot raised butthe top-stone thrown open. Figs. 3 and 4show respectively a side elevation and a top plan of a modified arran'ement for drawing at I a different position rom the dipping posi- 'tion.Fig. 5.is a vertical section-through the furnace and pot of Figs. '3 and4 with the pot lowered in position for dipping and the reducing chamberclosed.

The best practice heretofore a drawing pot from which the cylinders aredrawn, after which the pot is cleaned by melting out' the residue of.glass into a sepaother pot-must be used while the first part used as adrawing pot. This pot having two. cavities on opposite sides, foralternate use,

' if desired be covered by a top-stone23wh1ch is being cleaned. By myinvention the glass is not transferred by 'a ladle but is taken directfrom the furnace or a forehearth and the same vessel that acts as aladleisalso the pot is used continuously, the remaining glass beingmelted out each time. whi e the reverse side of the pot is being us'lfor drawing. y

In Figs. 1 and" 2, I show a forehearth 6 1 extending from a meltingfurnace ,7. It

. this art.

has been to .melt the glass ina furnace and dip it'out" with ladleswhich in turn are emptied into has on top a sectional top-stone 8, 8-,the parts of which are supplied with brackets 9, 10, which maybeoperated bymeans of a bell crank lever 11 to open and close the-topstone. v

, Suspended above the opening into the forehearth I place a vessel 12which is supported on trunnions 13, carried in turn by llnks .14 andlevers 15 which may be operated' by the cylinder 18 to raise andlowerthe vessel 12. This vessel is formed with cavities OILbOtll sidesand is adapted to be revolved on its axis when lowered into the glass G,so as to dip up a sufficient-quantity of glass to draw a cylinder orother article. When the pot 12 is lowered into the glass it pot ismerely lowered into the glass and revolved to dip a quantity into one ofthe cavities and then raised to the position shown, when the top-stone 8is closed, while the drawing apparatus pulls up the cylinder out ofthepot, as is usual and well known in proceeding, it will benoted thatthe fore- 1s revolved by means of a sprocket chain 16 which may beoperated conveniently by- While the drawing operation is hearth isvcompletely closed and thereupon I vflame is introduced through the blowpipes .19 to meltout and reduce the remnants of glass-1n the oppositecavity of the not. By

the time the drawing is completed thislower cavity is cleared and it ismerely-necessary to dipthe pot-again and reverse its position when theapparatus is ready for another draw. In order to make more certain anduniform the "melting back of the remnants of glass, I may use theapparatus shown .in

Figs. 3 to 5', or 'an equivalent thereof. In this the forehearth ordog-house 20 has aforward extension 21 which is a little larger than thepot a'nd'forms a reducing. chamber, being separated by a wall 22 fromthe forehearth 20; This reducing chamber may manipulated by the chain 25attached to a pivovide-o couple oft carrier brackets which lov may beconveniently raisei anti lowereil air cylinders 26' operated oyvalves-$27. The pot 12 has near, the onto trmmions sqnare-lllOok'sQS n'rest'on the track 29 of the hraoeete. In the side Walls of theforeheorth 'gpfovided verticinl slots- 38, covered. by SlOi'tGL'lplates. 31- adjustably mounted, and in post tion to engagethe trnnnione-32 of the pot when the lat-tor is lowened' by lowering tl'xe 1511pporting brackets 26. r

The'onterends of the lillllfllliflllsare .provideo with cranks 32* towhich are connecte-l the links 33'attocl'1ed to a; oros.;-hend- 3tnston. rod operated by the; cylinder 35 s valve 36; This piston-is forthe (low k le purpose of sliding the. pot on the track .Ji'evolving itfor. dipping. It will be that. upon lowening the bracket 26 as nil- 3in. in Fig. 5,. the pot: will be brought dose to the: glass in the tank.and: will rest on its; tlzunnions in. the bottom of the slots 3i thathlooksQS Will be out of en? mgemont with the bracket. In.thisposimthellne tn-rust. on the lmks 33 wlll-be the den-i center of thecrank 82 and by he revolved through: 2, half turn. Upon neesmg thebracket 26 agzun the blocks 28 11 level. and steady the pot Wlnoh 15then -i?8il'-S(;Cl to the position shown in li lg. 3,

whereupon-the crank 32 lei-n the direct line" of' drew of the piston rodnncl link. The p on is then drawn back nncl the pot is slid alongthetrnck 29 untilit takes the position shown in. .cl'ottecl lines inFig; 3 overthe opening in the relemlng clmmher' '21. Meanwhile thepotlms pushed backward the top- 223 on to} its supporting; table37151116. mmmed "planing The draw takes place over the re:

" onening wl' She l'otiom oosv rlr l l l that the eame vessel is 11 odrewlng pot and thee of glass are av Ul'i course it will be understood.that the net'us above set forth is illustrative only one. n y lnventmnlnife'hrooal, :rsapeots is not oonfined to any specmo design ofmeel'nnnor to they one of "power to mum-e the :neol'n .JlSllL fl-lovingthus my invention and illustrated its use, 'WlIIL J. claim as now anddesire to secnre by lllettorePntenh, is the fol lowing:

1. ln tllE; ll1l1ll'f-? glass artioles, the method. 'wl: e I 5 1nlowering a pot into n body of molten glass with a pot cavity thereinfnoil'wf downwardly, then turning the pot on its horizontal axis to fillsaid cavity with enilloient glass for the drawing of e single articleand revert the pot, then raising the pot to the to? of the furnacechamber containing the only of molten glass and drawing an articledirectlt therefrom While the pot is still over said chambersubstantially as described.

2. In the manufacture of drown glass ortieles, the method which consistsin lower ing an clol'lbleczm'it i ell-owing vessel into n mess of moltenglass with one of its cavities facing Clown-Word,filling snicl. cavity lrotary movement of the pot Within of molten glass, reverting and roismpot, and; then drawi g on article (1,. fromv the glass in the filled.covitv and snnnl- 'tzmeously therewith appl lent to the other pot cavityto melt 1 due of glass 'le-lt from on. drawing operation; substantially.as described.

Intho manufacture of drawn glass articles, the method which consists insuccesfilling opposite cavities of a doublenot by lowering thepot: inalternately positions into a; mass of molten a l tum-"fin it therein,drawing an meal" l1 two snceessive fill-- l one the filled ozwity 1dimming ope1":!,- 1 of glass; in the 'tzznlinlly as described.manufacture of cles, the method which consists in lowering turning thepot on its horizontal axis to fill said cavity withsuflicient glass forthe drawing of an article, then inverting the pot and raising it to thetop of the furnace chamber sontaining the body of molten glass, movingthev pot to another position over said chamber, and then drawing anarticle directly therefrom and during the drawing operation applyingheat to the'pot to melt out the residue of glass remaining from aprevious operation in a second cavity thereof; substantially asdescribed.

6. In glass drawing apparatus, a double pot, and. means for dipping saidpot into molten glass in either of two reversed positions; substantiallyas described.

7. The combinationwith a furnace forehearth having a top opening, of apivoted drawing pot, means for raising and lowering the pot, and meansfor turning the pot on its.

pivots while in its lowered stantially as described.

8, The'combination with a furnace forehearth having a top opening, of adrawing pot having cavities in opposite sides thereof,

position; submeans for raising and lowering the pot, and

means for turning the pot while in its lowered position; substantiallyas described.

9. The combination with a furnace having a forehearth, of a pivotallymounted double pot, means for dipping the pot in either one of tworeversed positions and for turning it while dipped; substantially asdescribed.

10. The combination with a furnace chamber having a top opening, ofadrawing pot movable through said opening, a movable support in which thepot is mounted, means for turning the pot on its support, and meanswhereby the support may be moved longitudinally to carry the pot towardand away from the opening and also vertically to raise and lower-the potthrough the opening; substantially as described.

'11. The combination with a furnace havlng a forehearth, said forehearthhaving a forward extension, and both the forehearth and its extensionhaving a top opening, of a drawing pot, means for moving the pot from aposition over one opening to a position over'the other opening, 'meansfor raising and lowering the pot-through the opening in the forehearth,and means for turning the pot to dip it when lowered through saidopening; substantially as described.

12. The combination with a furnace having a forehearth, said forehearthhaving a forward extension, and both the forehearth and its extensionhaving a'top opening, of a drawing pot, means for moving the pot from aposition over one opening to a position over the other opening, meansfor raising and lowering the pot through the opening in the forehearth,and means for turning the pot to dip it when lowered through. saidopening, together with means for applying heat to the reverse side ofthe pot while it is over the opening in the said extension;substantially as described.

13. The combination with a furnace chamber having a top opening, of adrawing pot movable through said opening, a movable support in which thepot is mounted, means for turning the pot on its support, and meanswhereby the support may be moved to carry the pot toward and away fromthe opening and also vertically to raise and lower the pot through. theopening; substantially as described.

In testimony whereof I have hereunder signed my name in the presence ofthe two subscribed witnesses.

M. L. MONRO.

Witnesses:

G120. l Mono, J r.,

' F. W. H. CLAY.

